Cold hardiness & minimum temperature

Is Agastache 'Kudos Coral' (Agastache 'Kudos Coral')cold hardy? Hardiness zone & min temp

Also called Kudos Coral hummingbird mint.

More about agastache 'kudos coral'

About Agastache 'Kudos Coral'

Agastache 'Kudos Coral' · also called Kudos Coral hummingbird mint · flowering

Agastache 'Kudos Coral' is a compact, dwarf hummingbird mint bred for dense coral-peach flower spikes from midsummer into autumn. It thrives in full sun and sharp drainage, drawing bees, butterflies and hummingbirds while shrugging off heat and drought. Aromatic minty foliage deters deer and rabbits. Short-lived but reliably perennial in well-drained, lean soils.

Cold limit: USDA 5-9 · RHS H5 (-23 to 35°C)

Watch for — Winter crown rot: Wet, heavy soil over winter is the most common cause of death. Plant in sharply drained ground or raised beds and avoid mulching directly over the crown.

What agastache 'kudos coral''s hardiness rating actually means

Yes — agastache 'kudos coral' is genuinely cold hardy. Rated RHS H5 and USDA 5-9, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H5 means: Hardy in most of the UK and in cold winters. On the US scale that maps to USDA 5-9 — the zones where it can be left outdoors year-round.

New to these scales? The USDA hardiness zone map explained covers how the zone numbers work, and you can find your own zone with the zone finder.

Minimum temperature — and what happens below it

Minimum survivable temperature is roughly about −15 to −10 °C. Agastache 'Kudos Coral' is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for agastache 'kudos coral' as it gets too cold:

It tolerates winter lows to about −15 to −10 °C once established.
Below its rated zone, the visible damage is browned or blackened top growth and, in the worst case, a killed crown or root.
First-year, newly planted, or container-grown specimens are noticeably less hardy than established garden plants — the roots are exposed.

Can agastache 'kudos coral' go outside or overwinter — and where?

Plant it out within USDA 5-9 and it overwinters with little or no help.
It does not want to come indoors — a warm winter room actually weakens a hardy plant by denying it dormancy.
The real risks in its range are waterlogging, wind-rock on young plants, and a late hard frost on new growth — not ordinary winter cold.

Work back from your local frost dates with the frost-date calculator: the last spring frost and first autumn frost are what really decide when agastache 'kudos coral' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Agastache 'Kudos Coral' hardiness — frequently asked questions

Is agastache 'kudos coral' cold hardy?

Yes — agastache 'kudos coral' is genuinely cold hardy. Rated RHS H5 and USDA 5-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Agastache 'Kudos Coral' is hardy across USDA 5-9; it belongs in the ground or a frost-proof container, not on a windowsill, and many types actively need a cold winter to perform.

What is the minimum temperature agastache 'kudos coral' can survive?

Minimum survivable temperature is roughly about −15 to −10 °C. Agastache 'Kudos Coral' is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is agastache 'kudos coral'?

Agastache 'Kudos Coral' is rated USDA 5-9 and RHS H5 — Hardy in most of the UK and in cold winters.

Can agastache 'kudos coral' survive winter outside?

Plant it out within USDA 5-9 and it overwinters with little or no help. It does not want to come indoors — a warm winter room actually weakens a hardy plant by denying it dormancy. The real risks in its range are waterlogging, wind-rock on young plants, and a late hard frost on new growth — not ordinary winter cold.

What happens to agastache 'kudos coral' below its minimum temperature?

It tolerates winter lows to about −15 to −10 °C once established. Below its rated zone, the visible damage is browned or blackened top growth and, in the worst case, a killed crown or root. First-year, newly planted, or container-grown specimens are noticeably less hardy than established garden plants — the roots are exposed.